Sintering ores.



.PATENTED SEPT..10, 1907.

J. SCOTT.

SINTERING ORES.

APPLIJOATION FILED NOV. 1a 1906.

2 SHEETS-SHEET 1.

nnoQcBn INVENTOR 2 $HEETSSHEET 2.

INVENTOR PATEN'I'BT) SEPT. 10, 1907.

J. SCOTT.

SINTE-RING ORES.

APPLIOATION FILED NOV. 13.1906.

wrrnzssss 7 having an annular series of outlet openings 3 near itslower'end for the products of hombustion which pass throughto theannular chamber 4 from which the pipe I, UNITED Y STATES PATENT OFFICE.

JAMES SCOTT, OF PITTSBURG, PENNSYLVANIA.

srn'rnnme onus.

To all whom it may concern:

. forming part of this specification, in which Figure -1 is a sectionalside elevation showing one I form of my improved apparatus; and Fig. 2is a partial sectional view showing the upper part on a larger scale.

My invention relates to the agglomerating or sinter- 5 ing offinelydivided ores, especially the flue dust-of blast furnaces; and isespecially designed to improve upon themethod and apparatus set forth inmy copending application No. 338,238, filed October 13,

In carrying out my invention, 1 drop the finely divided ore or flue dustin a shower through a-furnace chamber, into which burners project inannular series at different levels, the heat being so regulated that theore will be partially fused and sintered during its drop through thischamber. The burners substantially provide' annular sheets of flame atdifferent levels, through which the showering ore must drop. The bottomof the chamber is preferably provided with .a feed-out device,which'willaid in forming the partially fused.

materialinto lumps and-discharge them. I preferably feed out these lumpsor masses into a water bosh, from i which they may be carried into a caror receptacle,

preferably by means of a conveyer which passes through 7 this waterbush. 1 s

- In order to retard the descent of the showering me I employ bafll'esor retarding devices, particularly in the upper part of the apparatus,whereby the ore is more fully exposed to the action'of the flame andheat, andthe' sintering action more completely obtained.

In the drawings, in which I show ai lprefe'rred form of my apparatus,Zrelpresents-a vertical cylindrical furnace chamber which may be builtin the ordinary form or a metal shell with refractory lining, suchchamber fileadsto the stack 6. I have shown this stack as l o- T whichit may be taken to'the top of the sintering appa ratus. Above thechamber 2 is provided a supplemental chamber 8 whichis also preferablyformed of a metal shell or shells with refractory'lining, thiscontaining a conical baths 9 supported onspider arms 10.

Both the chambers 8 and 2 are heated by annular rows of burners 11supplied by gas'from a gas main 12 having depending valved branches 13;andwith airfrom an air main 14 having depending valved branch pipes 15;The supply of gas and air to each burner may Patented Sept. 10, 1907".

Application filed November 13,1906. Serial no. 343.181.

thus be controlled so that the annular sheets of flame at differentlevels may be controlled and regulated as to direction and volume. L

At the top of the chamber 8 I preferably mount a hopper 16 ofupwardly-flaring form within which is mounted a conical baffle 17 ofsimilar form to the baffle 9, this being carried on spidor arms 18. Thematerial is fed in the top of the hopper from the feed hopper 19 bymeans of a slotted valve or gate 20 moving over the slotted bottom 21 ofthe hopper 19.. For reciprocating shown a platform 24 carried on theupper hopper and having a surrounding hand rail or inclosure 25.

hopper plate having an opening closed by corrugated rollers 26. Theserollers are driven by any suitable connection, and as they turn inopposite directions toward each other they serve to compact and form thepartiallyfused material into lumps as they feed it out. I preferablymount these rollers on yielding bearings so as to avoid breaking themand provide for the discharge of larger or smaller lumps. Below thefurnace bottom I preferably mount a water bosh 27 through a chute 29from which the material is discharged into a car. Thelumps or masses ofpartially fused material are then fed out to the car, by which they maybe taken to the blast furnace or other point of use. a

In the use of the apparatus, the feed-slide at the top of the furnace isreciprocated at a substantially uniform rate of speed, and thereby theflue dust or fine ore is dropped through the chamber at a substantiallyliminary heating chamber 8 it is distributed by the baflies ordeflectors 17 and 19, through the hopper 16, and is also retarded in itsdescent, so that a greater period of time is provided for the sinteringaction of the flames. The carbon of the flames also assists in theagglomerating action. The heat of the furnace both in regulated inany'desirable manner, and as the showeringore descends its temperatureis increased until it is partially fused before reaching the bottom.

The connection of the chamber 8 to the chamber 2 is preferably of hoppershape, as shown at 30, .so that the ore is again distributed andretarded somewhat as it enters the main furnace chamber. This partiallyfused material is continuously fed out by the corrufurnace itself. Thedraft is preferably downward through the furnace, as shown, thusavoiding injury to the feeding-in device. and improving the action.

this valve or gate I have shown an eccentric rod 22 leading from aconstantly-driven shaft 23. I have also The bottom of the furnace isformed by an annular I which extends a conveyer 28, this conveyerleading to uniform rate. As the material drops through the pre-' g'atedrollers, in the form of clinker or sintered lumps. If the flue dust iswet, or for any reason needs drying,

this is carried out by the heat from the stack of the are fed into thewater bosh, and thereby cooled, and

the preliminary chamber and the main furnace may be i The advantages ofmy improved structure arise from the use of the r'etarders or ballles\i'hich serve not only to retard the showering ore or line d net, but todistribute furnace chamber; a. deflector with plain faced rolls may beused instead of the corrugated feed-out rolls; and many other changesmay be made in the form and arrangement of the parts without departingfrom my invention. I

In apparatus for sintering ores, an open vertically extending furnacechamber having a movable feeding device at the top arranged to showerthe ore, burners arranged at different levels and a compacting andfeeding out device at the bottom of the chamber; substantially asdescribed.

2. In apparatus for sinterin; or .s, a vertically extending furnace]chamber having a feeding device at the top arranged to deliverthe ore ina shower within the chamber, burners at different levels projecting; ito the chamher and a water bosh into which the sinter 1 material in fed;substantially as described.

3, In apparatus for sinterfng ores, an open verticallyextendine furnacechamber having burner s projecting chamber, and a feeding devicenrranged'to shower the ore thereinto at different levels, a preheatingturnace having retarding devices at the top of the main furnace chamber,30 and a feeding-out device at the bottom for the partially fusedmaterial; substantially as described. l

4. inllpparatus for sintering ores, a vertically-extend" ing furnacechamber having retarding devices in its top portion at diiferent levelstherein, andburnerd surrounding 85 its top portion; substantially usdescribed. I i 5. In apparatus for slntering ores, a ve'rtlcally extend ingfurnace chamber having'a preliminary heatiii'g chamben at its top,retarding devices in said preliminary heating down into the preliminaryheating chamber substantially as described. i

6'. In apparatus for sintering ores, a main furnace chum her, apreheating chamber above it having a retarding device, and hoppermechanism arranged to continuously feed 7. in apparatus for sinteringores, a vertically extending furnace chamber having a Ieeding'devl'ce atthe top arranged to deliver the ore in a shower within the cham-' 50"her-,lmrncrs at different levels projecting into the chamber, a waterbosh into which the sintered material is fed, and, a convcyer arrangedto carry the material but ot thc ter bosli; substantially as described.

n testimony whereof, [have hereuntoset my hand.-

' JAMES SCOTT.

Witnesses: l

JonN MILLER, II. M. Conwrn.

